With a bra on, wrap a tape measure snugly, but not too tightly, around your rib cage, just below your bust line. This is your band size (US/UK sizing uses inches).

Then, wrap the tape measure around the fullest part of your bust. If the difference is:

1" / 2.5cm your cup size is A

2" / 5cm your cup size is B

3" / 7.5cm your cup size is C

4" / 10cm your cup size is D

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About the Designer

Lingerie label Skarlett Blue is all about feeling sexy every day. The NYC-based brand was launched in 2013 by designers who wanted to create modern, alluring underthings that exuded effortless support and total confidence. Striking a playful balance between feminine fabrics and daring cuts, Skarlett Blue lingerie is the definition of provocative sophistication.
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